Flexible cooler



FIG. 1 is a top, left side perspective view of a flexible cooler showing our new design, the strap and two zipper pulls are shown in broken lines for illustrative purposes only and forms no part of the claimed design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof, the opposite side being a mirror image;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a flexible cooler, as shown and described. 